Please login with your username and password.


Can’t remember your accounts password?

Can't access your account?

Select your language.

This page is available in the following languages:

    Please select your location

    MasterRoc TSG 7 

    Tail sealant for shielded tunnel boring machines (TBM)

    MasterRoc TSG 7 description:

    MasterRoc TSG 7 tail-shield sealant is used for shielded tunnel boring machines (TBMs). MasterRoc TSG 7 sealant effectively seals the gap between the shield and concrete segments to prevent the ingress of soil, water or grout.

    MasterRoc TSG 7 sealant is formulated as a “first fill” product to resist water and ground pressures and not break down under high mechanical pressures. After the initial “first fill” application, the use of pumpable grades such as MasterRoc TSG 6 sealant are required to ensure effective TBM tail shield protection. MasterRoc TSG 7 sealant has excellent pumping properties and adhesion on most surfaces

    Recommended uses:

    • Tunneling with shielded TBMs

    What are the unique features of MasterRoc TSG 7?

    • Excellent pumping properties
    • Excellent sealing properties
    • Adheres to most metal or concrete surfaces

    What are the benefits of MasterRoc TSG 7?

    • Prevents the ingress of soil, water or grout into shielded TBMs​

    Direct contact

    Master Builders Solutions Technical Support

    Admixture Systems


    Safety Data Sheet (SDS)

    Find all available safety data sheets for this product.

    Product Certifications

    Generate a free certificate of conformance for a specific Master Builders Solutions construction product.

    Related Literature

    MasterRoc TSG 7 Data Sheet

    pdf (199.91 Kb)

    Project Spotlight: Doan Valley Storage Tunnel

    pdf (752.43 Kb)